Shears-sharpener.



Patented ept. n, 1900.

K. RDSSLER. SHEARS SHARPENER. (Application filed Apr. 10, 1900.)

(No Model.)

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UNITED STATES PATENT OFFICE.

KONR'AD ROSSLER, OF FORT WVORTH, TEXAS.

SHEARS-SHARPENER.

SPECIFICATION forming part of Letters Patent No. 657,619, dated September 11, 1900.

Application filed April 10, 1900. Serial No. 12,376. i (No model.)

To (tZZ whom it may 007206770 Be it known that I, KONRAD RossLER, a citizen of the United States, residing at Fort Worth, Texas, have invented a new and Improved ShearsSharpener, of which the following is a specification.

My invention relates to devices for sharpening shears,and more particularly to a clamp for holding the shears in position to be operated on by a suitable hone; and the object is to produce a device for sharpening shears or scissors or other objects and which can be manufactured at small cost and which can be put up in a small package.

The sharpener is designed for fine work on shears and other tools.

Other objects and advantages will be fully understood from the following description and claims.

Reference is had to the accompanying drawings, which form a part of this application.

Figure 1 is a side elevation of the invention, showing a section of scissors-blade clamped in position to be operated upon. Fig. 2 is a plan view of the invention, showing a pair of scissors in place for sharpening. Fig. 3 is a portion of a blade, illustrating'the strokes of the hone on the blade. Fig. 1 illustrates a va' riation of the clamp, the nut and the washer being shown in vertical section. Fig. 5 illustrates another variation of the clamp, the nut and the movable jaw being shown in vertical section.

Similar characters of reference are used to indicate the same parts throughout the several views.

This invention consists of a body 1, having an arm 2 and a jaw 3 and an upper jaw 4, loosely attached to the body by a loose rivet 5. The two jaws are shown engaging a scissors-blade 6 in Fig. 2. The upper jaw 4 is secured on the blade by a thumb-screw 7. The bevel-setter 9 is secured to the arm 2 by means of the thumb-screw 8. The hone 10 is provided with a guide-rod 11. This guiderod passes through a hole in the bevel-setter 9 and works loosely therein. The sharpener may be secured to a work-bench or desk or table by the screws 12.

The variation shown in Fig. dconsists of the body 13 having the upper jaw 14 integral therewith, and having the end 15 threaded and provided with a nut 16 and a coneshaped washer 17. The nut 16 is adapted to press a scissors-blade 18 against the upper jaw 14. The body 13 is provided with an arm 19, similar to arm 2 of the form shown in Figs. 1 and 2.

The variation shown in Fig. 5 consists of the cylindrical body 20, having the arm 21, the jaw 22, the movable upper jaw 23, and a nut 24; for controlling the upper jaw 23. The upper jaw 23 has a sleeve 25, which engages a shank of the body 20. A portion of the body 20 is threaded, on which the nut 24 moves to operate the upper jaw 23. A lug 26 is inserted in or made integral with the shank of the body 20, and a slot 27 is made in the sleeve 25. This lug will prevent the upper jaw from turning.

I have shown a sharpener which iscapable of accomplishing the finest work on such instruments as barbers and surgeons shears. The bevel from the cutting edges can be ground to any desirable angle. The angle which the bevel makes with the fiat edge of a blade can be made slight or it can be made great. For general domestic work the bevel must be made at almost right angles to the fiat surface. Barbers want the angle much smaller, so that the blade will have what is known as a keen edge. The angle is increased by elevating the guide 11 of the hone. If the bevel-setter 9 is not high enough, a higher one may be used. The angle is diminished by lowering the setter 9. The setter can be placed in an upright position or at any position between the upright and a horizontal position. Fig. 1 shows the setter in an upright position, and Fig. 2 shows the setter turned considerably to one side. The position in Fig. 2 will make the angle which the bevel makes with the flat surface of the blade much smaller than the position in Fig. 1 and the edge will be keener. This setting of the bevel also regulates to some extent the strokes of the hone on the bevel. The strokes are biased toward the rivet of the blades, as shown in Figs. 2 and 3, the bias being greater in Fig. 3. The strokes of the hone make teeth on the bevel, which teeth may be seen with a microscope.

file-teeth. The object in having the teeth biased toward the rivet is to prevent hair or The teeth will resemble other objects from slipping on the edges of the blades. If the teeth were biased toward the point of the blade, the object to be cut would slip or slide along the edge of the blade. The bias can be further regulated by clamping the blade nearer or farther from the point of the blade. When the teeth point toward the rivet, the object to be cut will be pressed against the points of the teeth; but if the teeth pointed toward the points of the blades the object to be cut would be pressed against the sides of the teeth. The strokes must be inclined or biased toward the rivet When the for determining the angle which the bone makes with the flat surface of the blade and for regulating the strokes of the hone on the bevel of the blade.

2. A sharpener for shears comprising a body having an arm at one end and a jaw at the other end, an upper jaw, a loose rivet for securing the upper jaw on said body, a thumbscrew for clamping said jaws on a blade of the shears, a bevel-setter mounted on said arm, and a hone provided with a guide-rod operating through said bevel-setter.

3. A sharpener for shears and other tools comprising a body provided with means for holding rigidly a blade of the shears, means mounted on said body for giving any desired bevel to the blade and for biasing the stroke of the hone on the bevel, and the bone for sharpening the blade.

In testimony whereof I set my hand, in the presence of two witnesses, this 6th day of April, 1900.

KONRAD ROSSLER.

Witnesses:

A. L. JAoKsoN, J. M. MOTHERSHEAD. 

